427431561 has 16 divisors (see below), whose sum is σ = 603857664. Its totient is φ = 268003584.

The previous prime is 427431559. The next prime is 427431569. The reversal of 427431561 is 165134724.

It is not a de Polignac number, because 427431561 - 2¹ = 427431559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (427431569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119775 + ... + 123291.

It is an arithmetic number, because the mean of its divisors is an integer number (37741104).

Almost surely, 2^427431561 is an apocalyptic number.

It is an amenable number.

427431561 is a deficient number, since it is larger than the sum of its proper divisors (176426103).

427431561 is a wasteful number, since it uses less digits than its factorization.

427431561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920.

The product of its digits is 20160, while the sum is 33.

The square root of 427431561 is about 20674.4180329217. The cubic root of 427431561 is about 753.2784252451.

The spelling of 427431561 in words is "four hundred twenty-seven million, four hundred thirty-one thousand, five hundred sixty-one".